/**
* struct damon_target - Represents a monitoring target.
- * @id: Unique identifier for this target.
+ * @pid: The PID of the virtual address space to monitor.
* @nr_regions: Number of monitoring target regions of this target.
* @regions_list: Head of the monitoring target regions of this target.
* @list: List head for siblings.
*
* Each monitoring context could have multiple targets. For example, a context
* for virtual memory address spaces could have multiple target processes. The
- * @id of each target should be unique among the targets of the context. For
- * example, in the virtual address monitoring context, it could be a pidfd or
- * an address of an mm_struct.
+ * @pid should be set for appropriate &struct damon_operations including the
+ * virtual address spaces monitoring operations.
*/
struct damon_target {
- unsigned long id;
+ struct pid *pid;
unsigned int nr_regions;
struct list_head regions_list;
struct list_head list;
* @DAMOS_HUGEPAGE: Call ``madvise()`` for the region with MADV_HUGEPAGE.
* @DAMOS_NOHUGEPAGE: Call ``madvise()`` for the region with MADV_NOHUGEPAGE.
* @DAMOS_STAT: Do nothing but count the stat.
+ * @NR_DAMOS_ACTIONS: Total number of DAMOS actions
*/
enum damos_action {
DAMOS_WILLNEED,
DAMOS_HUGEPAGE,
DAMOS_NOHUGEPAGE,
DAMOS_STAT, /* Do nothing but only record the stat */
+ NR_DAMOS_ACTIONS,
};
/**
* uses smaller one as the effective quota.
*
* For selecting regions within the quota, DAMON prioritizes current scheme's
- * target memory regions using the &struct damon_primitive->get_scheme_score.
+ * target memory regions using the &struct damon_operations->get_scheme_score.
* You could customize the prioritization logic by setting &weight_sz,
- * &weight_nr_accesses, and &weight_age, because monitoring primitives are
+ * &weight_nr_accesses, and &weight_age, because monitoring operations are
* encouraged to respect those.
*/
struct damos_quota {
*
* @DAMOS_WMARK_NONE: Ignore the watermarks of the given scheme.
* @DAMOS_WMARK_FREE_MEM_RATE: Free memory rate of the system in [0,1000].
+ * @NR_DAMOS_WMARK_METRICS: Total number of DAMOS watermark metrics
*/
enum damos_wmark_metric {
DAMOS_WMARK_NONE,
DAMOS_WMARK_FREE_MEM_RATE,
+ NR_DAMOS_WMARK_METRICS,
};
/**
struct list_head list;
};
+/**
+ * enum damon_ops_id - Identifier for each monitoring operations implementation
+ *
+ * @DAMON_OPS_VADDR: Monitoring operations for virtual address spaces
+ * @DAMON_OPS_PADDR: Monitoring operations for the physical address space
+ */
+enum damon_ops_id {
+ DAMON_OPS_VADDR,
+ DAMON_OPS_PADDR,
+ NR_DAMON_OPS,
+};
+
struct damon_ctx;
/**
- * struct damon_primitive - Monitoring primitives for given use cases.
+ * struct damon_operations - Monitoring operations for given use cases.
*
- * @init: Initialize primitive-internal data structures.
- * @update: Update primitive-internal data structures.
+ * @id: Identifier of this operations set.
+ * @init: Initialize operations-related data structures.
+ * @update: Update operations-related data structures.
* @prepare_access_checks: Prepare next access check of target regions.
* @check_accesses: Check the accesses to target regions.
* @reset_aggregated: Reset aggregated accesses monitoring results.
* @cleanup: Clean up the context.
*
* DAMON can be extended for various address spaces and usages. For this,
- * users should register the low level primitives for their target address
- * space and usecase via the &damon_ctx.primitive. Then, the monitoring thread
+ * users should register the low level operations for their target address
+ * space and usecase via the &damon_ctx.ops. Then, the monitoring thread
* (&damon_ctx.kdamond) calls @init and @prepare_access_checks before starting
- * the monitoring, @update after each &damon_ctx.primitive_update_interval, and
+ * the monitoring, @update after each &damon_ctx.ops_update_interval, and
* @check_accesses, @target_valid and @prepare_access_checks after each
* &damon_ctx.sample_interval. Finally, @reset_aggregated is called after each
* &damon_ctx.aggr_interval.
*
- * @init should initialize primitive-internal data structures. For example,
+ * Each &struct damon_operations instance having valid @id can be registered
+ * via damon_register_ops() and selected by damon_select_ops() later.
+ * @init should initialize operations-related data structures. For example,
* this could be used to construct proper monitoring target regions and link
* those to @damon_ctx.adaptive_targets.
- * @update should update the primitive-internal data structures. For example,
+ * @update should update the operations-related data structures. For example,
* this could be used to update monitoring target regions for current status.
* @prepare_access_checks should manipulate the monitoring regions to be
* prepared for the next access check.
* monitoring.
* @cleanup is called from @kdamond just before its termination.
*/
-struct damon_primitive {
+struct damon_operations {
+ enum damon_ops_id id;
void (*init)(struct damon_ctx *context);
void (*update)(struct damon_ctx *context);
void (*prepare_access_checks)(struct damon_ctx *context);
*
* @sample_interval: The time between access samplings.
* @aggr_interval: The time between monitor results aggregations.
- * @primitive_update_interval: The time between monitoring primitive updates.
+ * @ops_update_interval: The time between monitoring operations updates.
*
* For each @sample_interval, DAMON checks whether each region is accessed or
* not. It aggregates and keeps the access information (number of accesses to
* each region) for @aggr_interval time. DAMON also checks whether the target
* memory regions need update (e.g., by ``mmap()`` calls from the application,
* in case of virtual memory monitoring) and applies the changes for each
- * @primitive_update_interval. All time intervals are in micro-seconds.
- * Please refer to &struct damon_primitive and &struct damon_callback for more
+ * @ops_update_interval. All time intervals are in micro-seconds.
+ * Please refer to &struct damon_operations and &struct damon_callback for more
* detail.
*
* @kdamond: Kernel thread who does the monitoring.
*
* Once started, the monitoring thread runs until explicitly required to be
* terminated or every monitoring target is invalid. The validity of the
- * targets is checked via the &damon_primitive.target_valid of @primitive. The
+ * targets is checked via the &damon_operations.target_valid of @ops. The
* termination can also be explicitly requested by writing non-zero to
* @kdamond_stop. The thread sets @kdamond to NULL when it terminates.
* Therefore, users can know whether the monitoring is ongoing or terminated by
* Note that the monitoring thread protects only @kdamond and @kdamond_stop via
* @kdamond_lock. Accesses to other fields must be protected by themselves.
*
- * @primitive: Set of monitoring primitives for given use cases.
+ * @ops: Set of monitoring operations for given use cases.
* @callback: Set of callbacks for monitoring events notifications.
*
* @min_nr_regions: The minimum number of adaptive monitoring regions.
struct damon_ctx {
unsigned long sample_interval;
unsigned long aggr_interval;
- unsigned long primitive_update_interval;
+ unsigned long ops_update_interval;
/* private: internal use only */
struct timespec64 last_aggregation;
- struct timespec64 last_primitive_update;
+ struct timespec64 last_ops_update;
/* public: */
struct task_struct *kdamond;
struct mutex kdamond_lock;
- struct damon_primitive primitive;
+ struct damon_operations ops;
struct damon_callback callback;
unsigned long min_nr_regions;
void damon_add_scheme(struct damon_ctx *ctx, struct damos *s);
void damon_destroy_scheme(struct damos *s);
-struct damon_target *damon_new_target(unsigned long id);
+struct damon_target *damon_new_target(void);
void damon_add_target(struct damon_ctx *ctx, struct damon_target *t);
bool damon_targets_empty(struct damon_ctx *ctx);
void damon_free_target(struct damon_target *t);
struct damon_ctx *damon_new_ctx(void);
void damon_destroy_ctx(struct damon_ctx *ctx);
int damon_set_attrs(struct damon_ctx *ctx, unsigned long sample_int,
- unsigned long aggr_int, unsigned long primitive_upd_int,
+ unsigned long aggr_int, unsigned long ops_upd_int,
unsigned long min_nr_reg, unsigned long max_nr_reg);
int damon_set_schemes(struct damon_ctx *ctx,
struct damos **schemes, ssize_t nr_schemes);
int damon_nr_running_ctxs(void);
+int damon_register_ops(struct damon_operations *ops);
+int damon_select_ops(struct damon_ctx *ctx, enum damon_ops_id id);
-int damon_start(struct damon_ctx **ctxs, int nr_ctxs);
+int damon_start(struct damon_ctx **ctxs, int nr_ctxs, bool exclusive);
int damon_stop(struct damon_ctx **ctxs, int nr_ctxs);
#endif /* CONFIG_DAMON */
-#ifdef CONFIG_DAMON_VADDR
-bool damon_va_target_valid(void *t);
-void damon_va_set_primitives(struct damon_ctx *ctx);
-#endif /* CONFIG_DAMON_VADDR */
-
-#ifdef CONFIG_DAMON_PADDR
-bool damon_pa_target_valid(void *t);
-void damon_pa_set_primitives(struct damon_ctx *ctx);
-#endif /* CONFIG_DAMON_PADDR */
-
#endif /* _DAMON_H */
projects / linux-2.6-microblaze.git / blobdiff